Burglar-alarm.



orinar-Ano nr GIOVANNI,

or New Yoan, N.

.arr oesters Y., ASSIGNOR 0F 0NEHALF TG JULUS HAMMER, OF NEW YRK, N. Y.

BURGLAR-ALARM.

hostess.

Speeication of Letters Patent.

To all whom it muy concern: a

Be it known that I, GAETANO DI Giovanni a subieet of the King ot Italy,aud-a residenty ot the city of N ew York, Bronx, in the county and State'of New ,Yorinr have invented a new and improved the-case may be, zwillcause the electric alarm to be actuated. y

More particularly stated, l provide a number of cordseparated from eachother, and for some purposesindependent, and connect with each cord aContact mechanism so arranged that a slaclteningg or a tightening ot'the cord will cause the Contact mechanism to close an electric circuit.

Reference is to be had to the accompanying drawings 'form-ing a part otthis speciig cation, in which similar characters of reference indicatecorresponding parts in all the views.

Figure 1 is a fragmentary view. showing my burglar alarm as applied to awindow; 2 is an enlarged section., showing eertain details as to themountingf ot the cords and their connection with the contact meehanism;and Fig. 3

is a diagram of the wirwall i is provided with a window, door, or 'thelike, 5. For convenience, l will designate this part hereinafter as awindow. roller 6 is provided with a spiral springA 7 and is mounted uponbrackets 8 the latter being secured upon a small shelf i), immediatelyabove the window. yThe roller 6 and its associated parts constitutemerely an ordinary type of spring roller such as is used forinstance, inconnection with rollinhecurtains. A number connected with the springpend through holes l1A iu rod l2 is connected with the lower ends of allot these cords. This rod carriesrings 13, which may be brought intoengagement with staples lll, or other fastening mounted below thewindow. By drawing the rod l2 directly downward, and bringing the rings13 into engagement with the fastenings 14, the various cords l() may bekept taut.l

roller 6. and dethe shelf 9. 'A

`cord, 1.0" being stretched as undertake to pass through borough of the.

ot cords 10 are separatelyv [application filed April 4, 1910. Serial No.553,172.

'At 10a, 10", are shown two of the cords7 the cords l0 being eut orbroken. and the might happen, a burglar should the window.

Mounted upon the shelf gare a] nuniber of metallic brackets l5, andj'ournaled upon each ot'these brackets by aid of a pivot, pin 16a is aContact lever 15, having generally the form of a bell crank. Undereaelicontact lever is a spring 1T, which. tends to raise the lever.Extending above the window is a ba r1.8; and mounted upon the lattervare a number ot contact buttons 19, so arranged that when theeontactlevers 16 rise in consen ouenee of the pressure ot' the springs i? under them, the Contact levers are brought into engagement with theContact buttons 19.

At' 20 are a number of Contact buttons each being disposed diiectlyunder one ot' the contact levers 18. laeh contact lever iti is providedwith eye 2l. and each cord 10 is threaded through. one oit these eyes.llaeh cord lO'is further provided with a bead or knot 22 which engagesthe eye 2l with which it is associated. By 'this arrangement, wheneverone ot the cords is pulled directly dowlnward, so that the bead or knot22 presses upon the c vc 2l, the contact. lever lo associated with thatparticular. cord is rocked.- and thus brought into engagement wit-h thecontact button 20; also associated with that particular cord. When onevot' the oontaetlevers t6 is depressed by the vtightening ot' its cord.its eye is drawn down at 21a. and when one of the cords is relaxed orbroken, the contact lever affected thereby is' Q1 appears as indiraisedso that its eye cated.

A battery is shown at Q3, and connected with the latter is a wire 24. Analarm bell i's shown at 9A, and lwith the lutter is connected a wire24". Joining this wire are two other wires Q5, Q6. which extend alongtheshelf 9. Connected witlreaeh wire Q5 are a nur'nber of short wiresQ7, leading respectively to the ContactI buttons 19. Connected with thevarious Contact buttons 20 are short wires 28,1111 of which areconnected with the wire Q6. The various con tact levers 1G are connectedby wires 29 with another wire 30, the latter leading to a hand switch3l. This hand switch is connected by a wire 32 with the. battery 23.'Any number of bells 24e may be employed and these bellsmay be disposedin dierentwlocations for the purpose of. giving alarm simultaneously.For* instance, '.fne bell m'ight' be located on thestreet, o e inthequarte's or" the lWatchman 'or janitor, and

one in aprivate detective a'ge`ncy., Y S0, also, anyA numberofpairsofWiresfffl"Vg 26 may lead to these bells, therebeingi desired,

` a separate pair of WiresI to each button 19 20. Since. vthe wiringmaybe doneina variet-y of 'Ways and I do not wish to be limitl I ed to anyparticular wiring, I do not conf now, that a burglar undertakes'tc enterthis 2G Window. He may succeed in raising the sash, but Yin an efforttoen'ter the 1roem he isvery likely to break some of the cords anfdtosubject others to' unusual tension. For

instance, as indicated 'in Fig. 1, the cord 10Aa is broken andl the cord10" is unduly stretched. Inf breaking anyone of `the cords,- henecessarily slackens its upper portion, audit-he contactlever. lfwithWhich-.it

sassociated'being thus freed from the pressure cf its bead 0rknot 22',rises in consequence of the upward pressur'e'of the spring 17. Thecontact -lever 16 thus affected is,-

theefore, brought` intoengagement with its contact button 19. The'following -circuit switch 31, Wire 30, oneofythe'wres29;One

of' thefcontact levers 16," one' f the contact buttons 19, one oftheWires 27, 4mire 25', wire' 24h, bell '2481, wire 24, back to"'battery.This rings the bell,` andof course'. 'creates an alarm. Suppose,however, v that or'any reason the breaking cr cutting of thecord 10 yfailed to produce the effect just described,

tlie cord' 10b being unduly Stretdned, es' indi; cated inV Fig. l,causes its 'corresponding Contact lever v16 to be drawn downwardly,

ccntactleve'r 16, its'contact button 20,5'th'e and -into engagementVwith its 'Contact vbutton 20. The following, circuit` is Athus com.-A

pleted: battery 23,' 1vire32, switch 31,.'wire I y y nameft-Q-,thisspecificationl inehg'presenceof 105 30, onecf the [Wires 29, the-Acerresponding ccrrespfnndingwire 28, wires 26 a'ndj24lgbell' 2li?,andwire 24 back to batte '-I 23,.-` .It thus; happens that' thestretching() the' cord 10.b

'ing of the cord 10, due to its being cut or broken l Forconvenience Ishow only an electric bell; asa means ofgiving the alarm. It wilbbe;understood that I do not limit my, self thereby, .as in the presentstatecf the art, the ringing of an electric bell is merely theequivalent of any other arrangement for giving an alarnLj Neither do Ilimit myself -to the' particular varra'ngemexitv of the several partsasshown, nor. to the employment of thelcircuit precisely asdescribe Itwill be'noted romFigs. 1 and', that when the bai- 12 is drawn down', andsecured, the various contact levers 16 'are in 'suspensin as it were,each 'contact lev'er be- 'ing out of engagement with its centact buttons179 and 20, but liable to be brbught into l engagement with its butt-on1'9by the relax- 75 'ation ofthe particular ccrd associated with thecontact leveraifeeted, and also liable to be brought int'oengagementwith the con# tact' button 20 associatedwitlrthat-inertie ened.- 1Having' thus' :described my' p1-mention, claim as new The 'cdmbinationoff a lrcllecidscon i '85 the saidro'ller and having. knotted enlarge-*ments at equal distances. from theirjsax`d-'.j' conecte'dend's, a' bellcrank leven foreach.

n'ectied to 4and' .adapted to* be .Wound-upon through the ape1fture."mlywhichthefcord -is `said venlargementA vabovegthe said arm, 'a' springbearing against-. sa1d-lever Aand tendtion,"cntac t'b11t'tons disposedin'tliev aths of movement of said leverl in opposite irecf'," vtions,.means vto' sound. ani alarm" when said* lever contacts. with veither cfsaid buttons, la

z maintain 1 Intestinonyi lwhereof have'nsigned 'my' two.subscribingwitnesscs.

willsound the alarmas Well'.as'thrillblacked .HnnMaun Wiesner. i

and desire to secure' by Letters l n ingyto morel thev same inanupwarddirecyj N .bar tp'.'which 'the loweriree ends'of the y i Acordsare' r attached, 'and `means to` deta'chv100 ably secure saidbar 'a'osition adapted to lthebell-craifik everslfreeof rtheirI -c

